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Experimental study of the effect of different heat transfer plates on the heat transfer characteristics of flue gas condensation
Guo Jian Ji, Xiao Qing Zhou, Jia Hua Cheng, Bei Bei Lu and Qun Feng Zou
To mitigate greenhouse gas emissions, flue gas “whitening” is conducted to promote energy conservation and emission reduction. Based on a large channel plate heat exchanger with different heat exchange plates, this paper establishes a rotary wind tunnel condensation heat exchange experimental platform to measure the physical parameters of inlet and outlet wet flue gas and obtain the average heat transfer coefficient of different plate structures. By changing the operating parameters of wet flue gas, the influencing factors of the condensation heat exchange process of the wet flue gas are studied and analyzed. The results show that within the range of 366 K-418 K, the heat transfer coefficient of wet flue gas decreases with the increase of inlet temperature. At the same inlet temperature, the lower the moisture contents of wet flue gas, the less Re affects the condensation heat transfer coefficient. At the same Re number, the condensation heat transfer coefficient of the corrugated plate is the highest. At an inlet temperature of 364 K, the heat transfer coefficient of the corrugated plate is 4% higher than that of the serrated plate and 45% higher than that of the horizontal plate. Therefore, for saturated water vapor in condensed recovery flue gas, the corrugated plate heat exchanger has the best performance.
Keywords: Flue gas, Plate structure, Inlet wind temperature, Wind speed, Condensation heat exchange
DOI: 10.32908/hthp.v53.1541